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Hello LF Group,
Short update from Stefan, DK7FC - he is ready and try now to bring up the kit. Wind is now increasing from zero and he hope it comes up.
I keep you updated.
Regards
Marco, DD7PC
From: [email protected]
[mailto:[email protected]] On Behalf Of Stefan Schäfer
Sent: 21 October 2010 17:26
To: [email protected]; Paul; Renato Romero; Barzen, Guido;
Bernd Grupe; Christian Axtmann; Bernd Strehhuber; George Vastianos
Subject: VLF: DK7FC's 8th VLF kite experiment
Dear VLF,
This weekend i plan to do my next kite experiment. I have got the permission
for a kite ascent up to 300m above GND on my QTH in JN49IS36VH.
I will be QRV either on saturday or on sunday, depending on the wx.
Attached you see the current wind forecast. For saturday the wind is not
optimal, a little weak but it will be dry. On sunday the wind is quite strong
and stable but there is probably some rain... I will have to see on friday
evening if i can start on saturday or sunday and will announce that here.
If i will start on sunday, where the SAQ transmission takes place, this will be
no problem since one can listen to SAQ and receive my transmission on an other
computer based RX (e.g. SpecLab), so both can be done to the same time :-).
The starting time should be as early as possible. I have the permission at
6...16 UTC!
The program is to...
- rise the 200m vertical and transmit a long carrier (30 min) on 8970 Hz, after
that a message in DFCW-600 and after that a message in DFCW-120, then a short
CW test.
- transmit on 6470 Hz in DFCW-600 hoping to be copied at further stations
(maybe M0BMU, SQ5BPF, OE3GHB, PA3FWM...?)
- if the wind will be optimal i will add another 100m and will try to transmit
at 5170 Hz, 58 km band. This might be once again the lowest frequency an
amateur has ever transmitted and reached the far field and above 1 Lambda, so
each reception will be a WR for amateurs ;-) BTW, my grabber in Heidelberg is
in < 1 Lambda ;-) The mode will be DFCW-600 as well.
- Then, coming back to 8970 Hz (maybe in the late afternoon) and transmit a
looong carrier for long time integrations, maybe for a new ODX.
- reach 1,4 A at 8970 Hz, 1 A at 6470 and 5170 Hz
- be detected at 3 new stations and a new ODX ;-)
- use a GPS disciplined transmitter (trying SpecLab as the VFO and DFCW
generator the first time)
- measure the R, 'C' of this 300m vertical on 137 kHz, preparing a new test
there ;-) Since it is 55 % of a full size lambda/4 GP, 5 pF/m is not valid i
assume
- be fascinated by the view of such an antenna which easily finds place in my
car after the test ;-)
Until now i don't know who of the german LF group members would be possibly on
the phone to make QSP to the reflector, just like Markus did it in the past. If
there is a german member who likes to do that job, please send me a personal
mail to exchange the phone numbers (Festnetz oder O2). Otherwise i have to play
my game there alone and will see what happend in the evening ;-)
BTW, the generator is running again. It started to run again just as i have
packed all my stuff in the car after the last experiment :-/ Never mind...
Have i forgotten something?
Please tell me if you think it is no good idea to transmit during the SAQ
transmission or what is your favorite day, if both is possible here. I would
prefer sunday, if the rain forecast changes to sunny :-)
73 and looking forward to the weekend :-)
Stefan/DK7FC
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